Electric motorcycle manufacturer Zero has followed up the success of its X and S ranges with the Zero DS – a combination dirt/street machine the company says can “handle any surface you can throw at it.” This new option for those looking to ditch their noise-polluting, emission-spewing internal combustion bikes looks very similar to the S model, but has a bigger front wheel (17 inch), chunkier tread on the back tire and a nobby on the front, specially-designed wheels and suspension and a distinctive naked round headlamp without the windshield found on the S.